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Classification (29 CFR 1910.1200 / GHS): No data are available on which to classify this material, and no hazard classification has been assigned to it. The absence of a classification reflects the absence of data, not evidence of safety.

Label elements: No GHS pictogram, signal word or hazard statement is assigned. The container is labeled “For laboratory research use only. Not for human or veterinary use.”

Hazards not otherwise classified: Fine lyophilized powder may be dispersed if the vial is opened carelessly; avoid generating dust. The biological activity of this material in living systems has not been characterized for the purpose of this sheet and must be assumed unknown. Treat as a substance of unknown toxicity and handle with the precautions in Sections 7 and 8.

Components. The vial contains the peptides below, co-lyophilized. The blend has no CAS number of its own; each component is identified separately. Milligrams are nominal per vial, as stated on the label and the lot certificate.

Component identity under review. TB-500: The recorded identity for this product is full-length Thymosin Beta-4, while the certificate for the current lot reports a TB4 fragment (17-23). These are different substances. We are not publishing a CAS number, formula, molecular weight or sequence for this product until the supplier and laboratory records settle which it is.

Inhalation: Move to fresh air. If breathing is difficult or symptoms persist, seek medical attention.

Skin contact: Wash with plenty of soap and water. Remove contaminated clothing. Seek medical attention if irritation develops or persists.

Eye contact: Rinse cautiously with water for several minutes, removing contact lenses if present and easy to do. Seek medical attention if irritation persists.

Ingestion: Rinse mouth. Do not induce vomiting. Seek medical attention.

Most important symptoms and effects: None known; no data available. Note to physician: Treat symptomatically. The material is a synthetic peptide of uncharacterized toxicity.

Suitable extinguishing media: Water spray, carbon dioxide, dry chemical or alcohol-resistant foam. Unsuitable: None known.

Specific hazards: Not flammable as supplied. Combustion of organic material may produce carbon oxides and nitrogen oxides.

Advice for firefighters: Wear self-contained breathing apparatus and full protective clothing as for any laboratory chemical fire.

Personal precautions: Wear the protective equipment in Section 8. Avoid dust formation; do not breathe dust. Ensure adequate ventilation.

Environmental precautions: Do not let the product enter drains.

Containment and clean-up: Sweep up or wipe up with a damp cloth without creating dust, place in a closed container for disposal, and wash the area with water. Dispose according to Section 13.

Handling: Handle in a laboratory by trained personnel only. Open the vial carefully; avoid dust formation. Avoid contact with skin and eyes. Do not eat, drink or smoke where the material is handled. Wash hands after handling.

Storage: Lyophilized: store at -20 °C, protected from light. Stable at ambient temperature during transit.

Incompatibilities: Strong oxidizing agents, strong acids and strong bases.

Occupational exposure limits: None established for this material.

Engineering controls: Handle in a well-ventilated laboratory; use a fume hood or ventilated enclosure when handling the powder.

Personal protective equipment: Safety glasses with side shields (EN 166 / ANSI Z87.1); nitrile gloves inspected before use; laboratory coat. Respiratory protection is not normally required with adequate ventilation; use a particulate respirator if dust cannot be controlled.

Reactivity: No hazardous reactions known under normal laboratory conditions. Chemical stability: Stable under the storage conditions in Section 7. Peptides may degrade with repeated freeze–thaw, prolonged exposure to moisture, light or elevated temperature.

Conditions to avoid: Heat, moisture, light, repeated freezing and thawing. Incompatible materials: Strong oxidizing agents, strong acids and bases. Hazardous decomposition products: Carbon oxides and nitrogen oxides on combustion.

No toxicological data are available for this material as supplied. Acute toxicity, skin corrosion/irritation, serious eye damage/irritation, respiratory or skin sensitization, germ cell mutagenicity, carcinogenicity, reproductive toxicity, specific target organ toxicity (single and repeated exposure) and aspiration hazard: no data available. The material must be handled as a substance of unknown toxicity.

No ecotoxicological data are available. Synthetic peptides are expected to be biodegradable and are not expected to bioaccumulate, but this has not been determined for this material. Do not release to the environment.

Dispose of unused material and contaminated packaging through a licensed chemical-waste contractor in accordance with federal, state and local regulations. Do not discharge to drains. Empty vials may be disposed of after rinsing, through the laboratory waste stream for the container material.

United States: Not listed on the TSCA inventory as a commercial chemical substance to our knowledge; supplied solely for research and development in small quantities. Not an OSHA-regulated carcinogen. Not listed under SARA 302/313 or California Proposition 65 to our knowledge. Not evaluated by the FDA; not a drug, food, cosmetic or dietary supplement, and not for human or veterinary use.

The purchaser is responsible for compliance with all federal, state and local regulations applicable to the possession, handling and disposal of research chemicals at their location.

Revision: Version 1.3, 16 October 2026. Generated from the AFA Biosciences catalog record for this product; identification, composition and storage sections follow the product page and lot certificate.

Prepared by: AFA Biosciences, from the catalog record for this product and supplier information.

Reviewed by: Pending review by a qualified chemist. Until signed, this sheet is supplier information, not a certified classification.

Disclaimer: The information above is believed to be accurate as of the revision date and is provided in good faith as a guide to safe handling in a laboratory. It is not a specification and no warranty is made as to its completeness. The purchaser must make their own determination of suitability and safety for their use. AFA TRADERS LLC, trading as AFA Biosciences, accepts no liability for use outside in-vitro laboratory research.